Q: itunes won't open and tells me it is incompatible

Refer to this article:

iTunes for Windows: How to turn off Compatibility Mode

http://support.apple.com/kb/TS1489

Note: make sure to unchecked all boxes in Compatability tab for Windows 7.

Check if your Windows 7 is 32bit or 64bit version? (Start, right click Computer and select properties.)

See if you have installed 32bit or 64bit iTunes.

Install file:

32bit - iTunesSetup.exe

64bit - iTunes64Setup.exe