How to effect a "Permissions repair" (Adobe F.P.)?

Question

To elaborate, I have an OS X (Snow Leopard 10.6.8) and recently received, like so many others, the "blocked plug-in" message for most of my attempts to view videos, largely on YouTube. I seemed to have succeeded in "uninstalling" the old Adobe F.P. that I had procrastinated updating. Then I installed the latest (hopefully) version: 11.7.700.169 and everything seemed fine. Then I happened to skim an old Apple Support Community dialogue wherein one reader warned
that the last important step was to make and complete a "Permissions repair."  I started to follow his steps, but it seemed complicated and when he further warned of "security issues" I got a little gun shy.  Anyone who can walk me through this process, I would appreciate it greatly. Thanks, R. from W.

Answer 1

Long version: Save and/or quit your applications & doucuments  Go to Applications>Utilities Folder  Click Disk Utility. 
Click the Volumn (HD) that you want to check. 
Click the Repair Disk Permissions button. (Don't worry about verifying) 
At the bottom of window when the repairs have finished, you will see the “most important thing”: Permission Repairs Complete The previliges have been repaired or completed on the selected volumn.
Restart your computer (Optional).
Short version:  Go to Applications>Utilities>Disk Utility and select your volume and then select Repair Permissions. 
Same directions are also in the OS Mac Help Menu.