Read this post. It might or might not help you remove the program. It works for removal of Panda's Online Scanner, not quite sure if it will work for the trial version.
http://reviews.cnet.com/5208-6132-0.html?forumID=32&threadID=99979&messageID=1148093
Get comfortable...this may take a while.
I have been running McAfee InternetSecurity for several years, but was disappointed with the high resource usage. I heard about Panda Platinum 2005 Internet Security from a news article, stating it was low on system resources and had a new AI that could detect new viruses automatically at around 98% accuracy without downloading new definitions. Now I know it was too good to be true!
Note: I am running an HP Pavilion a810n with Windows XP Home SP2 on an AMD Athlon64 3300+ processor, 160GB HD, 1GB PC3200 DDR400 DIMM. No other security software is installed.
I completely uninstalled McAfee and installed Panda. Everything ran well until midnight after I installed at. At 12:00:01, I received notification that the trial had expired, and was given only two choices...activate or purchase. The main user interface has apparently locked itself down...I cannot access the program at all.
I closed Panda from the taskbar icon, and tried using the built-in uninstaller, launched from the Windows Add/remove control panel, to remove it. The uninstaller ran its course, and stated that the software had been uninstalled. However, the software reappeared in the add/remove dialog box a few seconds later, and the program launched itself again! Even a restart immediately after the uninstall didn't work (was never prompted to do so). 3rd party uninstallers also fail. Finally, I am receiving access violations when I attempt to delete the software manually using Windows Explorer.
The software has repeatedly disabled Windows Firewall, and will not let me install any competing products to protect my computer.
I attempted to obtain tech support from the manufacturer, but they will only help if I can provide proof I have purchased the product...apparently no support for those on a trial-basis.
I would like to know if anyone else has experienced these problems, and knows how to remove the software from my HD once and for all. Granted, reinstalling the OS will correct the problem, but am open to any possibilities before it comes to that.
Thank you for your support,
John

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