CS5 error 6 possible downloaded version!

Question

I have CS5 installed on my laptop but am now getting Error 6 which is telling me I need to uninstall & reinstall. Unfortunately, I cannot find my discs, I may have purchased an online download. I cannot find anyway of contacting adobe to ask if this is the case. I have the serial number registered on adobe.com. can someone please advise me how i can resolve this?

Answer 1

@Mylenium: Thanks for the speedy reply. I ran the tool in solution 1 through all three of its choices (run it, reboot and run it, reboot and hit 0) but it didn't change anything. Here's what it printed when it finished each time:
1st/2nd Time:
32/64-bit Anchor Service(s) installed successfully!
32/64-bit Anchor Service(s) installed successfully!
Licensing file not present
3rd Time:
Licensing file not present
I continued down the list of solutions until reaching Solution 5, dealing with the PCD folder that I get a "corrupted file" windows warning for, and I follow the steps and I get stuck on step 16: Applying the "Select the Replace Owner On Subcontainers and Objects option."
A box pops up saying "Changing ownershp of:", but the box is blank and after letting it sit there for 15 minutes doesn't do anything. If I hit the cancel button it switches over to a box saying "canceling" and proceeds to hang there too. I had to use the task manager to kill the program. I then tried it again and recieved the same results
Thoughts?
EDIT: The following solution requires that I delete cache.db file in the PCD folder, but said folder is "corrupt and unreadable" and will not give me access.