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I'm assuming you are not using Windows 10 here.
I'm having a difficult time trying to understand exactly what it is you are telling me because I don't have an
incognito mode per se in my version of Google Chrome (Version 46.0.2490.86 m). There are various things you can do to hide your identity, such as use a proxy or a VPN service, but after spending some time checking out the settings I see no choice for going incognito. Thus, I don't know exactly to what you are referring.
Google Chrome, as well as many other programs, save a lot of configuration information in hidden places on your computer. The best shot you have at removing it all is to use the highly recommended
Revo Uninstaller program. I'd also recommend that you do the removal in the Windows Safe mode:
http://windows.microsoft.com/en-us/wind ... =windows-7 The Safe Mode looks strange and primitive when you use it, but your chances of successfully removing everything are enhanced therein. Reboot into the normal mode after you remove the offending software.
Download a fresh copy of Google Chrome when you reinstall it. It changes almost on a daily basis so that you can only be certain you have what is current by downloading a fresh copy. If all your problems still exist after reinstalling a fresh version, then the problem is probably not the browser. It is something else that needs to be troubleshot.
While I can't be certain about this, some of the things you are describing sound like a problem with your monitor screen resolution. Go to the START menu (lower left corner) and in the search box type "adjust screen resolution." Click on the link from the list provided and experiment with the resolution settings. Once the monitor screen is set to the correct resolution, then the browser windows should start acting normal again.
There are a lot of browsers out there which are "lite" versions and easy on system resources. Of course the Lite software may not have all the features you want, but they should not give Loki a heart attack. Then there are ones not so "lite" but different enough from what you are currently using to possible give you a better experience. Here is a list from Wikipedia:
https://en.wikipedia.org/wiki/List_of_web_browsers It's mind boggling even to us experienced geeks. In any case, I'd be happy to help you out in any way I can. And, if you find something good, make sure you report back to us with all the details. I'm always open to new ideas.