Internet Explorer CPU Spikes and hangs Constantly within Citrix Desktops

Bradley1975
Bradley1975 used Ask the Experts™
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have about 70 Citrix Servers in my farm with users running Citrix Published Desktops. WE have had no issues with CPU on any of our internal applications. The problem is that we have people who like to surf the we on a lot of the PC's that our out on the Generic Login thin clients. I plan to later do published apps and move IE to its own server, but user's internet explorer sessions are always hanging up. Now this is 2 or 3 out of maybe 1500 sessions per day, but its still more than I would want to deal with. On a daiily basis, I have to go out and kill an iexplorer.exe CPU process for a user because it is sitting at 25% to 50%. I know I can use CPU Utilization Management to set slices, but Im trying to figure out why IE keeps doing this. Is it something related to Citrix, is my Symantec causing issues (version 10). Its becoming very frustrating. Im on Presentation Server 4.5 Rollup 4.

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Commented:
This sound like a similar problem I've had on the same platform. What helped us was to disable Adobe flash player.

There is two ways to do this. Either do it in Group Policy on machine settings ( a policy for all citrix servers). Or you can hack the registry on every citrix server. (see CTX110407 for more info).

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Commented:
Unfortunately we need Adobe Flash player on our Citrix environment. We are on Adobe Flash Player Version 9 within IE6. Does Flashplayer have the reputation of having the issue I described?
Commented:
I can only speak from experience. We have the exact same setup as you. 16 Citrix Presentation server 4.5. We had problems with customers calling in that their applications were slow. When we investigated the incident futher. We often would find sessions with Internet Explorer.. So we troubleshooted the incidents and found that flash could be the issue.

So now we disable flash by default. Only customers with special demands are given access to servers with flash. We hardly have problems with Internet explorer now. At least not incidents with high cpu. - High memory usage in IE is another story :)

Author

Commented:
Im thinking your correct in that Adobe Flash is my issue. Im going to first try upgrading to the most recent version of flash. I read the "Read Me" of some fixes since version 9 and a lot of these fixes were related to IE crashes and lockups. Im going to accept this as the solution for right now and deal with it if the upgrade does not fix any problems. I might be separating IE published Apps for IE Surfing use away from servers that people use production applications on. I don't think it is our internal apps with Flash player hanging up.. I think it is all the extracurricular activity going on. Thanks for your help!!!!

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