Hello guys, my PC has overloaded with so many junk,registry issues....so on.
Registry errors simply do no matter 99.9% of the time. I've used registry cleaners on many different computers over the years, and only twcie have I ever seen a registry cleaner actually fix issues and only once have I witnessed a noticable increase in speed from cleaning the registry.
Windows is designed so that excess junk in the registry will not slow your computer. For that reason, no matter how many hundreds or even thousands of errors a registry cleaner finds, they won't be slowing down your computer in excepionally rare cases. When it comes to fixing computer problems, due to the way registry clenaers work, once again it is exceptionally rare for them to actually fix anything.
To make matters worse, just about all registry cleaners have issues with false positives, meaning that they may incorrectly identify valid registry keys as being bad and deleted them. Doing so, is not a good idea and can casue problems. So, basically, registry cleaners are much more likely to cause problems, then to fix them.
If you have issues with Windows, then I highly recommend Windows Repair from tweaking.com Not only is it free, but it very good at fixing Windows problems, because it can fix some specific issues, rather than blindly deleting unneeded registry keys like registry cleaners do.
Kerish Doctor, which you listed, is also an excellent product too, and I am a registered user of it. It actually scans for and fixes Windows problems, and also can do some tweaking to improve system performance.