The upgrade to ie10 is usually a sign a website does not recognize your using Compatibility view,
You can usually see the Broken page icon on the top right of the url address bar
Blue is active,
If the icon does not appear use the F12 key and click on Browser mode and click on ie10 the page will automatically refresh then you can close the developer tools window.
On the other popup message,
You probably picked up a bug what security do you have Installed ? You can use these free tools to see if they find anything, Manually Update them before running full scans, Try not to use your computer while the scans are running, (one at a time of course). Uncheck the box to Activate the Free trial from the final install options, http://www.malwarebytes.org/products/malwarebytes_free http://www.superantispyware.com/?tag=SUPERANTISPYWARE This one is the longest up to 4 hours, the others are only about 45 minutes, http://www.microsoft.com/security/scanner/en-us/default.aspx
You can also see what's loading with windows using Clean boot, http://www.sevenforums.com/tutorials/179159-troubleshoot-application-conflicts-performing-clean-startup.html You can upload screen shots if you wish to, Use the link on my signature to see how.