Wierd Resolution Problem

I was studying and suddenly my brother called me saying that windows got uglier and something was wrong ..
When i checked out i saw these it looked like the pictures below.

*img191.imageshack.us/img191/7002/20130324120711.th.jpg
*img195.imageshack.us/img195/8595/20130324104354.th.jpg
*img199.imageshack.us/img199/9030/20130324114402.th.jpg
*img689.imageshack.us/img689/8608/20130324114411.th.jpg
*img845.imageshack.us/img845/4318/20130324114419.th.jpg

I tried changing the resolution but the pulldown icon is shaded in grey (not openable)
Also it said with an exclamatory mark just below the resolution that "your resolution is 640 - many items may be missing"

I thought of malware and did a fresh install and still the problem exists.

But this screen alone is normal
*s7.postimg.org/tb2tc7hrr/20130324_120711.jpg
I am so worried.I would be so much thankful if someone could tell me why this is happening and a possible solution.

Thank You ..