JPEG not recognized on my computer ?!

Recently my computer crashed, and now i got it back, but everything was uninstalled, and all the files had dissapeared. But if I search for them in My Computer they will re-appear. Anyway, Paint won't import or export .JPEG's anymore. Adobe premiere won't accept JPEG's anymore either, and my JPEG output on my image photoshop are alot more shaky now. I can still open JPEG's, but many programs aren't recognizing it. Anyone know ?

just an idea... 

open explorer go to extras/ folder options/ file types (in winxp... don't know if it's there on other OS too) select the jpeg file extension and klick advanced or click change /this will show you a number of programs that recognise jpegs... if there's anything unusal try to fix it... maybe there's a wrong action set... of course that's jsut a vague idea... regards steVe PS: please excuse any wrong english descriptions... i got the german winxp version on my comp. :-P

Explorer ? I don't know where that is....

the same thing always happens to me everytime i format my computer just read this

It will not solve directly your problem, but you can also use another viewer : It's free and very light.

My problem isn't viewing the images, I need them to be accepted. That's why Adobe Premiere isn't taking my JPEGS. In Microsoft Paint, it doesn't let me open or save JPEG files... I did what was at the site, but when i tried to go to the folder C:\Windows\MsApps\Grphflt the Grphflt folder isn't there.... I made one with that title and put the files in it anyways. And when I go to the Local Machine thing from Regedit etc. I see no JPEG thing with quotation marks around it. I'm running Windows 2000, if that matters and am logged in with Administrator capabilities. Please help me.

this should be easier after installing them, restart your computer (this should work)

The link is broken. :(