Corrupt and encrypted files

MacBook Pro, Mac OS X (10.7.5), Console (10.7), iTunes (12.2.2), Adobe Reader (10.1.14), Adobe Flash Player Install Manager (20.0.0.286)

I scan my computer and it comes back with 34 issues.

One is presumably a corrupt iTunes file:

/private/var/folders/8h/zypwkc510x3c9x3tgtrd6dqc0000gn/C/com.apple.SoftwareUpdat e/content/downloads/56/42/zzzz041-8972/kklo27b5gf5fqxsfmmiri7ove3n742dj3c/iTunes X.pkg/content/downloads/56/42/zzzz041-8972/kklo27b5gf5fqxsfmmiri7ove3n742dj3c/iT unesX.pkg

…and the other 33 are encrypted AdobeFlashPlayerInstaller files either in my Downloads folder or somewhere else:

/Users/student/Downloads/AdobeFlashPlayerInstaller_11_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_11au_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_11au_ltrosxd_aaa_aih-2.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_11au_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_12au_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_13au_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_14au_ltrosxd_aaa_aih-2.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_14au_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_15au_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_16_ltrosxd_aaa_aih.dmg

/Users/student/Downloads/AdobeFlashPlayerInstaller_17au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_11_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_11au_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_11au_ltrosxd_aaa_aih-2.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_11au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_12au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_13au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_14au_ltrosxd_aaa_aih-2.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_14au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_15au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_16_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.Preview/Data/Downloads/AdobeFlashPla yerInstaller_17au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_11_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_11au_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_11au_ltrosxd_aaa_aih-2.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_11au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_12au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_13au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_14au_ltrosxd_aaa_aih-2.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_14au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_15au_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_16_ltrosxd_aaa_aih.dmg

/Users/student/Library/Containers/com.apple.TextEdit/Data/Downloads/AdobeFlashPl ayerInstaller_17au_ltrosxd_aaa_aih.dmg

Well, I recently discovered that I should have moved the files in my Downloads folder as soon as I got them for security purposes. I think I ought to empty its contents into the Trash, though I also have uninstall_flash_player_osx.dmg and About Downloads in there, so I don't know what I should do about that. If I deleted them, would I be able to get them back if I needed them?

Do I still need the AdobeFlashPlayerInstaller files or can I delete them, and what should I do about the corrupt iTunesX file?