>>>It closes IE instance. For example, I go to Forum Main page, Downloads section, then select file, download it - and the page is gone. I experienced this behavior only at work, at home it works just fine. I checked all settings, but didn't find any responsible for this behavior.
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>>I don't know if that is applicable, but what is you reinstall the browser? If not at the latest version, you could take that opportunity to upgrade.
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>Well, it's 5.50 version already, which I believe is the latest, right? I've just downloaded new Nick's class (BTW, it's great, because I intend to use it in my current project), and the page disappears :(
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>Well, seems I have to...

I have 5.50.4522.1800. Since I have installed that version, I didn't have any crash as I use to have twice a day before.