Windows 7 pro stalls when installing new programs but not updates

Hi - I have some idea what to do.. I know I have to replace some corrupt dlls but can't find them anywhere.. if someone can just point me in the right direction that would be great..

Hi Maxi.. I've seen the repair in and install option and it really really worries me so I just thought perhaps I would use the manual method of replacing the corrupt files. I really don't want my computer to stop working... I am not sure if my windows disk has sp1 but assume it must have .... but the product key for Dell is not on the disk.. I think I had to phone up for it..so that's another worry...

Thank you , that is just what I needed I think. I will do this on Thursday (I have some important work to do today and tomorrow ) and update you on what happens. I have printed the relevant instruction page off..

The installation media is provided in both tutorials Maxie provided for either the Repair or Clean Reinstall.

If this Dell came with preinstalled Win7 then the COA sticker should be on the case or under the battery. Or do you have a retail copy that you activated yourself? If so then that key can be retrieved using the keyfinder in the Reinstall tutorial. I would use two to double confirm the key: Belarc from tutorial and Speccy - Advanced System Information Tool - Windows 7 Help Forums.

You can also first try the steps for replacing the damaged System Files given in SFC /SCANNOW Command. Then if not the next step is a Repair Install if you are satisfied with the install you have. Otherwise the Reinstall tutorial gives you the chance to have a perfect install as long as you stick with the steps, tools and methods in tutorial.