why my thumbnails are not appearing after starting Google chrome?

[Shruti]

my google chrome crashed after which i restarted my PC. After that when i opened google chrome, instead of thumbnails,an unknown search engine appeared....
its really driving me crazy....please help me to sort out my issue....

[Majbuddin Rbn]

uninstall google chrome from add/remove programs in control panel.
install google chrome again.
if possible update it to latest version, it will fix more number of bugs automatically.
If your operating system is windows, internet explorer must be installed as windows component. open internet explorer and download latest google chrome.