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'SymRealWinOpen is undefined' - why do I get this?

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Summary: An update to your popup-blocking software may be in order if you get the message 'SymRealWinOpen is undefined' on your machine.

'SymRealWinOpen is undefined' - why do I get this?

Apparently it's a side effect of one of the techniques some pop-up blockers use to prevent popups. I'd check with the vendor you got your popup blocking software from for more information, and possibly an update.

Article C2112 - July 10, 2004

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Recent Comments
26 Comments

I have had the same problem, even after re-installing the yahoo browser, although I found that this problem went when I disabled norton internet security's pop up blocker. Do make sure that you have an alternative installed though. I also use lavasoft adware pop up blocker so I can recommend no problems with that.

Posted by: Anthea Tilley at May 7, 2005 5:42 AM

If I just leave me PC switched on, I get the message line: 33, char: 1, 'symrealwinopen' is undefined. It asks if I want to run the scripts and wether you press yes or no, it opens up a pop up ad. I'm running XP and Norton Anti Virus. If I disable ad blocker, then surely I'm gonna get more ads coming through?

Posted by: buzz at June 21, 2005 12:13 AM

Blessings on you!!! It worked. It came from nowhere and has been driving me nuts

Posted by: barbara at July 30, 2005 11:59 PM

I had this problem everytime I did a Yahoo search. I fixed it by doing the following: Open Norton Internet Security. Click on Ad Blocking. Choose Configure (it is in bottom right corner). Click on Advanced. Click on the Ad Blocking Tab, it is on the right side. Scroll down and find the "Yahoo" html strings. Click Remove for each one.

This fixed it for me. Hope this helps eliminate this annoying problem for you.

Posted by: Michelle at August 1, 2005 9:56 AM

I've disabled script debugging, removed all traces of Yahoo! Search from my Norton Internet Security ad-blocking configuration and turned off ad-blocking. I still get this message. Argh!!!

I think I'm just going to use Google. *(sigh)*

Posted by: Cheryl at August 1, 2005 11:33 AM

everytime I open my msnmsgr (MSN MESSENGER), I get
Line:41
Char:3
Error: 'SymRealWinOpen' is undefined
Code: 0
URL: http://rad.msn.com/ADSAdClient31.dll?GetAd?PG=IMSCB2?SC=HF?ID=00014c90e081affb

then im asked if i want to debug. I've checked the url and it cant be located. and the debug doesnt work. Can anyone help me???

Posted by: MR.SKIDZ at February 8, 2006 7:57 AM

when i try to open my web page .
It shows errors. The top banner does not come out on my laptop but does on other computers.
Its says symrealopen is undefined.
What can i do
Thank you

Posted by: dan at August 28, 2006 2:53 AM

i get the same thing on firefox so how do i fix it so i can use onegreatfamily genealogy browser

Posted by: Rachael at September 22, 2006 2:39 AM

I think my computer might be monitored (by someone i know). When I log into internet explorer, it downloads rad.msn. i just happened to notice it yest. and then again today. what is that? also in my sypware doctor scan, i have been getting a "high" alert for netscape navigator. what is that and why can't i get rid of it. also some unusual reports on another computer in my house on java (plug in, gray paint box, sun java, and so on). Thank you. Allie

Posted by: Allie at February 1, 2007 10:35 AM

Re' SynRealWinOpen
I dont know how it works, but cotinually clicking "No" cleared the programme blocking pop-up on the "Outlook Express" that had an "Abbey National PLC" blag

Posted by: Kitcar at September 15, 2008 11:22 AM

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