I installed DR web anti virus on my Laptop 4 weeks ago, instantly internet explorer became pretty much unusable it either fails to start or immediately gives error messages "internet explorer stopped working". Safari and chrome browsers have also became less stable although not as bad. So far I've tried system restore, SFC /scannow, ccleaner registry check, chkdsk, defraggler and I've also restored internet explorer and tried starting without addons! None of the above have found any problems or resolved the issues.
Internet explorer 11 running on windows 7 64bit