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Pro PC Cleaner is a registry cleaner that is typically bundled with other software. It scans the and offers to remove outdated values, such as entries made by programs that are no longer installed and other unnecessary values, ostensibly, to reduce the size of your registry database and improve the computer’s performance.Pro PC Cleaner exhibits intrusive behavior, including questionable installation practices and frequent pop-ups and warnings, making it a potentially unwanted program (PUP).
Forget Registry Cleaners and other Optimizers. They can do more damage than good. The only cleaner we would recommend is CCleaner from piriform.com and only use that with it's default settings to clean out temporary files and temporary internet files. It has a registry cleaner, but it is not necessary to use that.As to free anti-virus scanners, most of the big named Anti-Virus utilities have free options and they all work, so asking which is best is difficult to answer. You will get as many different answers as replies. We suggest using an AV and also a couple of stand-alone manual anti-malware scanners that do not run in the background, like MalwareByte's Anti-malware and SUPERAntispyware.What are you using now, and why do you want to change?Mark.
MSE does have some very good reviews and works well, as far as I've seen on newer machines. However, I did try it on an older and so not very powerful machine by today's standards and the overhead on the machine was too heavy. Since the poster says he has an older computer and is concerned with performance, that may limit his options. I reverted to Avast Free and the performance picked up dramatically.
For reference, I use ZoneAlarm Free firewall and Windows Defender on this older machine to complete the MSE Equivalent set.so the ONLY items I've EVER used are all freebies, but I swear by 'em all (and have recommended as well). I've used AVGFree for years. The same goes for spyware programs Safer Networking's Spybot S&D is one if if not the best spyware program in the world, and it is FREE. About the only real difference between free software and the paid version is that most free software are usually manually controlled, and the paid version is automatically controlled, and the paid version might have more features included, but why pay for something that you might not ever use, if you only are going to use the parts you can get for free?