I worked on removing adware for 4-5 complete days running scans for hours on safe as well as normal mode. as mentioned i have done the following. Used Zemana, Hitman pro, malwarebites, spybot, sophos, kasperskey TDSS, KVRT, bitdefender virus removal tool, tool by TSA, microsoft security essentials,all in safe mode as well as normal mode. There was a time when i uninstalled chrome and i was not able to reinstall, the exe file would never run, so i had to run all the above tools in safe mode as well as normal mode, after which i was able to re install in safemode. Your help and advice is deeply appreciated. If there is anything that needs to be un installed please do let me know.