Start > (Search) MSConfig > Startup > Disable All
Usually helps when gaming. When you reboot and re-open MSConfig you may notice that certain options are still checked. Your PC will automatically keep options that are necessary to start your computer. Certain options (various installed programs) that aren't necessary to boot up your PC will be disabled. You can re-enable these options at any time.
If you notice an error in MSConfig while attempting to disable a certain option, you may have a virus. Write down the error code or file name and do a little research to remove the file. (Explained a little more below)
As mentioned, CCleaner is free to download and an excellent tool. I actually don't trust much else, especially if you have to purchase the product. Many Rogue Programs act as helpful tools, but they really wind up damaging your computer. Rogue Programs are fairly easy to remove if you know what you're doing. (It usually requires booting up in Safe Mode and accessing and deleting the files through Command Prompt and the Registry - but I wouldn't recommend this if you don't have experience with your OS software)
When new OS's come out, I've noticed the upgrade typically increases my performance. Keep in mind Windows 8 is coming out soon, but I wouldn't recommend upgrading just yet until it's been out for awhile. New operating systems also mean old games won't be compatible straight away.
If you're faced with re-installing your OS because simply cleaning it won't do, Windows 7 will back up your old files in a folder titled Windows.Old - however you won't be able to access any programs, only files. You'll have to reinstall any programs you wish to keep, but you can drag and drop old files from the Windows.Old folder into your newly wiped Desktop. This will save you some time getting your computer back to the way it was, but keep in mind, your computer might have been acting up BECAUSE of the files/programs/downloads you've previously put on there. (pr0nz hint hint)
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I have come to the conclusion that if something raises the debate, it is probably an exploit from Blizzard pov.
If something requires you to use very unintuitive mechanics that are "out of the gameplay" (in sense that it is not combat tactics) and doesn't seem to have been thought of: it is probably an exploit.
Now we can argue if we think that is one or not. It doesn't matter, Blizzard has the final word and in these matter I have very often seen them say it is an exploit:
One example close to this one:
At wotlk, you could go into a dungeon with a party of five. If you kick someone he stays in the dungeon for 60s before being kicked out. 5 person used this mechanic to go in a dungeon, kick one player, make him tag the enemies (meaning he gets all exp since he is not in a group) and then the group helps him kill the ennemies, he gets 100% exp from those mobs (and since they are elite they are worth a lot). Every 50s they group the player to avoid him being kicked. They do this over and over and the player reached level 80 very fast (1st world).
Now, there was a lot of argument saying there was no bug there. And it is true, everything relied on game mechanics and each thing separately was legal.
In the end Blizzard banned the 5 players (permanently).
For me the OP right here is quite close to this back in WotlK and from Blizzard pov I'm pretty sure they consider this as exploit.
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