I installed the trial version of Photoshop CS and after a couple days had to
delete and reinstall it. Now it says the trial period is expired even though I barely had a chance to look at it. I tried to uninstall it the second time but that didn't work--still says it's expired when I installed for the 3rd
time.
Yes, that's correct.
When you install the trial version, it records the date and time the trial will expire in your system's Registry. When you delete the software, it leaves this information still in the Registry; this is to prevent people from continuing to use the software indefinitely without paying for it.
You need to remove the Registry information pertaining to the Photoshop CS trial before you re-install the trial version. There are Registry tools available online at places like download.com and versiontracker.com, and you can also use the built-in program "Regedit" from your Start->Run menu.
Be aware that editing the Registry incorrectly may make your system unusable! The Registry contains information, including the location of driver files and system components, critical to Windows; if you make a mistake and screw up your Registry, you may have to comp-letely re-install Windows to fix it.
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