Q: "MSVCR80.dll Missing"

Go into your uninstaller panel, wherever your program to uninstall files is found, and get rid of Apple Application Support, Apple Mobile Device Support, and Apple Software Update.  Then scroll down to itunes and get rid of that.  I plugged in my iphone at this point due to previous messages of "device not found" issues.  Reinstall itunes, but when you do, make sure you untick all those little boxes INCLUDING the one that would give you software updates.  No running as an Administrator is needed.  When it installs, everything should be back up to par!

Still doesn't work for me...

I've tried otacon72's method multiple times and it still gives me the same msvcr80.dll message. When I restart my computer theres a message that pop's up saying icudt49.dll is missing.

What am I doing wrong???

Same thing happened to me today and I found the solution here in this forum. All you have to do it go to your downloaded programs...delete EVERYTHING connected to Apple (iTunes, bonjour, update app, etc ). There are 5-6 programs to delete. Then restart your computer...and download iTunes again. BY THE WAY, I tried returning my computer to the day before I did the iTunes update and that did not work!

I just did a system restore and it works.

fantastic....I am going to wait a few weeks now to update iTunes. let Apple get the bugs out first!!!

I followed the instructions given by otacon72 and everything went back to normal....almost.  My itunes is up and running and no more message, but, all my recently purchased music is gone.  Songs I purchased within the last week, including last night are nowhere to be found.

Thoughts?

The tracks should be in the media folder... Use File > Add Folder to Library to add the media folder or try iTunes Folder Watch.

tt2

Many thanks to you and Octacon72.  Twenty minutes of my time well spent.  Up and running.  Thanks again.

They are on my phone, but not on my PC.

I did the drop down to Add File to Library and it brings me to My Music in my computer.  It's all my old tunes, none of the purchased ones.

Were the tracks on your computer before the update?

Are they where they ought be be now?

Try signing out of the store and back in again.

Try transfering purchases from the device.

tt2

Thank you otacon72 your steps worked perfectly for this issue.  I have my iTunes music on an external hard-drive not the "C:\" drive.  And even after following the steps you provided (I also uninstalled Bonjour) even though you did not mention it, but others did...  Everything came back normal.  iTunes even knew which external hard-drive contained my music files and it also retained all of the setting and it appers to have retained all the artwork as well.  I have also spent many hundreds of hours updating artwork for my music.  Your willingness to provide the steps you took has helped and is greatly appreciated.  The last purchase I made was 1-5-14.  And they were still there so I am not sure if turingtest2's suggestions will be needed by everyone.

If i uninstall will that wipie out my library?

I tried this and it cleared it up.

Delete the following files in this order. The order must be correct!!!

Use control panel "programs and features"

1. I tunes

2. Apple software update

3. Apple mobile device support

4. Bonjour

5. Apple application support

Once the files have been deleted download and re-install I-Tunes from the I-Tunes store.

Once installed it worked for me.

same thing happened to me, i too wondered if something is wrong with the latest version of itunes..How do you fix? HELP

The frequently suggested repair steps listed in comments athttp://support.apple.com/kb/HT1923 and http://support.apple.com/kb/HT1926 did not work for me yesterday when I attempted for an entire day to fix this commonly reported problem with the newest iTunes update. I now realize that I overlooked one step listed in http://support.apple.com/kb/HT1923.

My computer has a Windows 64 bit operating system. I should have  paid attention to this instruction:

"If you have a 64-bit version of Windows, you'll need to confirm that the following folders have been removed:

• C:\Program Files (x86)\Bonjour
• C:\Program Files (x86)\Common Files\Apple\
• C:\Program Files (x86)\iTunes\
• C:\Program Files (x86)\iPod\  "

Tonight, I removed those previous version files from the Program Files (x86) directory and executed the rest of the steps listed. Success resulted. If you are struggling like I did to install the iTunes newest update on a Windows 64 bit operating system, you might benefit to recheck that you followed the instruction listed above.