I unplugged my sdcard, external display, WD My Book for Mac because I thought their drivers are out of date, but didn't help.
Here is the EtreCheck report:
EtreCheck version: 2.5.1 (203)
Report generated 10/2/15, 9:15 PM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: (What does this mean?)
MacBook Pro (Retina, 13-inch, Early 2015)
[Click for Technical Specifications]
[Click for User Guide]
MacBook Pro - model: MacBookPro12,1
1 3,1 GHz Intel Core i7 CPU: 2-core
16 GB RAM Not upgradeable
BANK 0/DIMM0
8 GB DDR3 1867 MHz ok
BANK 1/DIMM0
8 GB DDR3 1867 MHz ok
Bluetooth: Good - Handoff/Airdrop2 supported
Wireless: en0: 802.11 a/b/g/n/ac
Battery: Health = Normal - Cycle count = 70 - SN = C015103039ZFY5JA3
Video Information: (What does this mean?)
Intel Iris Graphics 6100
Color LCD 2560 x 1600
S24C750 1920 x 1080
System Software: (What does this mean?)
OS X El Capitan 10.11 (15A284) - Time since boot: less than an hour
Disk Information: (What does this mean?)
APPLE SSD SM0128G disk0 : (121,33 GB) (Solid State - TRIM: Yes)
EFI (disk0s1) <not mounted> : 210 MB
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
Macintosh HD (disk1) / : 120.11 GB (21.44 GB free)
Encrypted AES-XTS Unlocked
Core Storage: disk0s2 120.47 GB Online
USB Information: (What does this mean?)
Apple Card Reader 62,73 GB
Macintosh SD (disk2s1) /Volumes/Macintosh SD : 62.71 GB (4.84 GB free)
Broadcom Corp. Bluetooth USB Host Controller
Logitech USB Receiver
Macintosh SD (disk2s1) /Volumes/Macintosh SD : 62.71 GB (4.84 GB free)
Thunderbolt Information: (What does this mean?)
Apple Inc. thunderbolt_bus
Configuration files: (What does this mean?)
/etc/hosts - Count: 4
Gatekeeper: (What does this mean?)
Mac App Store and identified developers
Kernel Extensions: (What does this mean?)
/Applications/Transmit.app
[not loaded] com.panic.TransmitDisk.transmitdiskfs (4.0.0 - SDK 10.6) [Click for support]
/Applications/Viscosity.app
[not loaded] com.viscosityvpn.Viscosity.tap (1.0) [Click for support]
[not loaded] com.viscosityvpn.Viscosity.tun (1.0) [Click for support]
/Library/Extensions
[loaded] com.Logitech.Control Center.HID Driver (3.9.1 - SDK 10.8) [Click for support]
[loaded] com.paragon-software.filesystems.ntfs (382.0.14 - SDK 10.5) [Click for support]
/Library/Extensions/VyprVPN
[not loaded] foo.tap (1.0) [Click for support]
[not loaded] foo.tun (1.0) [Click for support]
/System/Library/Extensions
[loaded] com.Logitech.Unifying.HID Driver (1.3.0 - SDK 10.8) [Click for support]
System Launch Daemons: (What does this mean?)
[loaded] com.apple.airplaydiagnostics.server.mac.plist - /AppleInternal/Applications/AirPlayDiagnostics.app/Contents/Resources/AirPlayDi agnosticsServer: Executable not found!
Launch Agents: (What does this mean?)
[running] com.Logitech.Control Center.Daemon.plist [Click for support]
[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[running] com.adobe.AdobeCreativeCloud.plist [Click for support]
[failed] com.avast.secureline.update-agent.plist [Click for support] [Click for details]
[running] com.paragon-software.NTFS.fsnotifyagent.plist [Click for support]
[loaded] com.paragon.updater.plist [Click for support]
Launch Daemons: (What does this mean?)
[running] com.adobe.adobeupdatedaemon.plist [Click for support]
[loaded] com.adobe.agsservice.plist [Click for support]
[loaded] com.adobe.fpsaud.plist [Click for support]
[loaded] com.paragon.NTFS.launch.plist [Click for support]
[loaded] com.sparklabs.ViscosityHelper.plist [Click for support]
[loaded] com.wdc.WDPrivilegedHelper.plist [Click for support]
[running] vyprvpnservice.plist [Click for support]
User Launch Agents: (What does this mean?)
[loaded] com.adobe.AAM.Updater-1.0.plist [Click for support]
[loaded] com.bittorrent.uTorrent.plist [Click for support]
[loaded] com.google.keystone.agent.plist [Click for support]
[loaded] com.valvesoftware.steamclean.plist [Click for support]
User Login Items: (What does this mean?)
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Caffeine Application (/Applications/Caffeine.app)
TransmitMenu Application (/Applications/Transmit.app/Contents/MacOS/TransmitMenu.app)
Google Drive Application (/Applications/Google Drive.app)
VyprVPN UNKNOWN (missing value)
WDDriveUtilityHelper Application (/Applications/WD Drive Utilities.app/Contents/WDDriveUtilityHelper.app)
Other Apps: (What does this mean?)
[running] J8RPQ294UB.com.skitch.SkitchHelper
[running] com.apple.xpc.launchd.oneshot.0x10000001.CCLibrary - Invalid signature!
[running] com.apple.xpc.launchd.oneshot.0x10000004.EtreCheck - Invalid signature!
[loaded] com.xwavesoft.pomodoromac.LaunchAtLoginHelperApp
Internet Plug-ins: (What does this mean?)
Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
FlashPlayer-10.6: Version: 19.0.0.185 - SDK 10.6 [Click for support]
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 19.0.0.185 - SDK 10.6 [Click for support]
AdobeAAMDetect: Version: 3.0.0.0 - SDK 10.9 [Click for support]
Default Browser: Version: 601 - SDK 10.11
3rd Party Preference Panes: (What does this mean?)
Flash Player [Click for support]
Logitech Control Center [Click for support]
Paragon NTFS for Mac ® OS X [Click for support]
Time Machine: (What does this mean?)
Skip System Files: NO
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 120.11 GB Disk used: 98.66 GB
Destinations:
Time Machine Backup [Local]
Total size: 499.15 GB
Total number of backups: 21
Oldest backup: 2015-04-10 20:12:00 +0000
Last backup: 2015-10-02 15:06:28 +0000
Size of backup disk: Excellent
Backup size 499.15 GB > (Disk size 120.11 GB X 3)
Top Processes by CPU: (What does this mean?)
10% firefox
4% WindowServer
2% fontd
1% Pomodoro Time Pro
0% loginwindow
Top Processes by Memory: (What does this mean?)
1.17 GB kernel_task
983 MB firefox
901 MB Google Drive
442 MB softwareupdated
213 MB Adobe CEF Helper(2)
Virtual Memory Information: (What does this mean?)
8.20 GB Free RAM
7.80 GB Used RAM (2.66 GB Cached)
0 B Swap Used
Diagnostics Information: (What does this mean?)
Oct 2, 2015, 08:43:16 PM /Library/Logs/DiagnosticReports/Google Drive_2015-10-02-204316_[redacted].cpu_resource.diag [Click for details]
Oct 2, 2015, 08:40:45 PM Self test - passed
Oct 2, 2015, 08:25:48 PM /Library/Logs/DiagnosticReports/Google Drive_2015-10-02-202548_[redacted].cpu_resource.diag [Click for details]
Oct 2, 2015, 07:26:43 PM /Library/Logs/DiagnosticReports/Google Drive_2015-10-02-192643_[redacted].cpu_resource.diag [Click for details]
Oct 2, 2015, 12:23:04 PM /Library/Logs/DiagnosticReports/firefox_2015-10-02-122304_[redacted].cpu_resour ce.diag [Click for details]
Oct 2, 2015, 11:45:16 AM /Library/Logs/DiagnosticReports/firefox_2015-10-02-114516_[redacted].hang
Oct 2, 2015, 09:59:49 AM /Library/Logs/DiagnosticReports/firefox_2015-10-02-095949_[redacted].cpu_resour ce.diag [Click for details]
Oct 2, 2015, 07:59:41 AM /Library/Logs/DiagnosticReports/Google Drive_2015-10-02-075941_[redacted].cpu_resource.diag [Click for details]
Oct 2, 2015, 12:46:07 AM /Library/Logs/DiagnosticReports/postflightinit_2015-10-02-004607_[redacted].cra sh
Oct 1, 2015, 01:13:20 PM /Library/Logs/DiagnosticReports/httpd_2015-10-01-131320_[redacted].crash
Oct 1, 2015, 10:54:45 AM /Library/Logs/DiagnosticReports/Google Drive_2015-10-01-105445_[redacted].cpu_resource.diag [Click for details]