Cannot restore hard drive because of corrupted files?

At the moment, my Gateway M-Series laptop which has Windows 7 32bit will not do a system restore! It says my local disc ( C: ) has errors, it cannot check these errors so that I can restore the computer

My computer doesn't want to connect to the Internet also (lucky for me I have other means of accessing the Internet) and every time I open Chrome or any of my software it says there are corrupted files and the disk check will not run because there are corrupted program files? I haven't downloaded anything of late I keep a fairly clean hard drive, but when I went into system restore it set one of the restore points as 'DirectX Installed' which incidentally I haven't installed and isn't in any programs list.

I've already had quite a few issues with my computer...

Edit:

After some tweaking I found I was able to check the disk and restore the computer but I would still like to know if any of you have any input on how to avoid future problems!!

Please use CheckDisk to check your hard disk and more particularly your C drive for bad sectors. May be your hard disk is showing signs of packing up.

If CheckDisk gives a clean chit then perform a system file check by running the System File Checker and please let us know of the results of this check. The procedure to run it is described at http://support.microsoft.com/kb/929833

Also to go along with wanchoo's excellent advice I would check your system for a Virus and malware/spyware. With the description of your symptoms, it indicates some underlying issues of this type. Get into safemode with networking and run full scans of AV and malware/spyware software. Make sure they have their latest updates in safemode w/networking before you run your full scan.