Sometimes your IE may get infected by some spurious add-ons, incompatible browser extensions, spywares and malware.You can reselt IE7 to all default settings.This provides a quick solution to get IE settings to its workable state
1) Login as administrator.
2) Open IE-->> Tools -->> Internet Options -->> Advanced tab -->> Reset .
3) click Reset
4) IE will restore all default settings-->>click Close -->> click OK -->>OK .
5) Restart IE. Done!!!