What are these hidden files in my WINDOWS folder?

Best off leaving them where they are. You may need them. Deleting hidden files is all very well, if you are sure you know what you are doing. The thing is, you may get a little bit cocky and start deleting other system files you think you don't need and once you start that game you are heading down a dangerous path - believe me, I've been there!

NO!!!!!!! they are very important, if you see your computer start up again leave them alone! otherwise you might not even be able to log on :O

They are roll backs for windows updates you can delete them ok, unless you want to uninstall any of the windows updates - unlikely

They are windows hidden folders for windows updates. normally can be deleted. not viruses. they are residual after a update from windows.

i think they are update files most files under windows folder are program files that make your computer run, some when accidentally deletted your comp. may not work properly.

Just because files look strange you should not delete them. There are uses for them that may not be apparent or they would not be there. They are hidden to assure that they are not brother with. Unless a good anti-virus program ID them as a virus. Leave those files alone.

Those are your uninstallers for Microsoft updates (security, fixes, etc.). When MS installs an update, unless it's an unremovable update, they give you an uninstaller for each one, in case they don't work properly on your computer. For years people have said you can delete them after you know the update is compatible with your computer & you won't need to uninstall. You can copy them to a disk, which is what I used to do, but now I've just deleted most of them through mid 2007. I keep the ones that say something after the KB####, like MediaPlayer11, etc.

It is completely safe to delete these files. Programs Like CC Cleaner and Tune-up offer the facility to auto delete Windows Update uninstallers which is all these are. However looking at hidden files can lead you to go "delete happy" Hidden files are hidden to prevent casual users from deleting important system files. Use a system performance tool to delete and clean up your hard disk and windows installation otherwise you could delete something important like IOsys files and render your PC useless...

WARNING! Leave well alone. Do not remove them! Remove the wrong ones and you will not be able to boot properly. They are part of the registry updates. That is why they are hidden to stop people from interfering with them especially if you don't know what you are doing!