There can't be a generalized list of Windows problems. If you provide us with a problem area specifically, we can try offering solutions.However, I will try listing out some common problems and "could be" solutions. Please note that there is no hard rule that the solutions stated will solve your problems for sure. These are just the suggestions, and actual solution depends on ground analysis.
Start up Too slow
Close down all programs at shut down. Run scandisk and/or defragmentation.
CD/DVD won't eject If you are burning CD/DVD , wait till it is over. If burning is frozen, press CTRL+ALT+DEL, highlight the process and end it. Manually restart the PC, press eject button and quickly take out CD/DVD, before Windows boots up.
Printer won't print
Make sure you have correct Printer enabled. You can check it from Print Manager windows which appears when select Print.Uninstall the printer from your computer and restart PC, the printer should now work with correct drivers. If still it does not, reinstall printer with your printer installation CD. Please don't Uninstall your printer if you don't have Installation CD.
Running out of memory
Open Run and type cleanmgr. It will remove all unnecessary and temp files.Use Duplicate Cleaner to delete your duplicate files. You can either move the files to recycle bin or to be safe, to some other folder.
Can't Uninstall a program
Use Revo Uninstaller. It is a really wonderful piece of software. I regularly use it to get rid of stubborn programs. You can remove registry entries of deleted aplication with Revo Uninstaller.
As I said before, this is NOT an exhaustive list. Unless we get the correct problem area, we can't suggest a way to solve it.
Live....and Let Live!