Windows 7 stopped working, Cant start antivirus programs or anything

Hi...
Im having the same issue las good 10 days. Im using my computer at work so I can go on here and ask for help.
My Toshiba satelite laptop, running on windows & home premium restatrted by it self and when it came back lots of things were different.
-The web cam meny box on the side(or top) of the screen was gone.
-I was able to enter my files but I couldnt start or install any programs. Couldnt start any antivirus program and I have (Avira and Ad-Aware)
-Internet browser is not openning either
-I tried to start it in Safe mode, safe mode with internet, Repair my computer and basicly any option in 'advanced boot options-F8'-nothing
Recover or restoring to some other day is not working either and lots of options in control panel wont start, all those that have something to do with computer settings or system to do.
-Is a Format disc only option.. and what happened.???!!

Thank you in advance....

try spybot search & destroy, sounds like some spy ware

How do I get to that.? Just type that in in Search or..?

Golden beat me to it (again) but if you can't boot, follow the procedure below to run sfc /scannow at a repair boot. Use Method One and follow the steps 1-10.

SFC /SCANNOW : Run in Command Prompt at Boot

It is saying 'Windows Resource Protection did not find any integrity violations'...

But everything is still the same....

And I dont have the Windows 7 cd-dvd. I wuld have to buy it first. Its just weird that I can acces my files but cant start or install any programs or go online.

Are you getting a black screen on start-up and a message about Windows 7 not being genuine?

Are you getting any error messages when you try to start a program?

Are you the only user on the PC or do you have multiple accounts?

Fill in your system specs so we know what type of PC we're talking about. (Model, Desktop, laptop, homebuilt-MB, etc.)

I have two accounts on there. My personal and Guest.
When I start a program or the internet explorer it flashes like its gonna open it and then it just stops.
No black or blue screen everything seems normal.

It is a laptop, Toshiba Satellite C650, and its windows 7 home premium. Its just lil morr then a year old.

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