Webmaster Forum / Browsers / Internet Explorer / December 2006

After we installed IE7, several users began to report sporadic loss of
responsiveness, slowness, delays, characters they typed not showing up
for several seconds, clicking on links and icons producing no results.
These symptoms affected other applications--not just IE7.  After a few
weeks of struggling to find the culprit, it finally happened to me.  I
popped up task manager and found CTFMON.EXE using 99% of CPU.
Disabling this process seems to have solved all of these issues.  See
KB 282599 for further info.
Keywords:  hang hangs slow slowness hesitation loss of focus delay
delays