cannot install the programs

And here's the link to download Malwarebytes' Abti-Malware: http://download.cnet.com/Malwarebytes-Anti-Malware/3000-8022_4-10804572.html?tag=main;pop Remember to update it before running a full scan.

Charles, you are an expert of computer and that is why I value your response (that does not mean I do not value other responses lolzz..) I think we need to press f5 while computer getting started. Am I right? I cannot see any restore date and I was not able to perform System restore that was the problem, I think it is happening because of the virus or malware. if I download MalwareBytes then how can I install it in that laptop when I am not able to install softwares, I think I can install it in pen drive then I can run it on his laptop it can be possible. I had downloaded MalwareBytes but that was trial version and expired after sometime, can you suggest me any freeware but effective software which can protect my pc from malwares? thanks.

thanks for the response. MalwareBytes is good software but unfortunately it is not a freeware. you said, Malwarebytes itself is a Freeware unless you activate its "Pro Trial Version". Once it " Pro Trial" expire, it does not have any real time protection but however, you are still able to update it and use it to remove any infections. is that mean we can get it by just simple sign up? yes, I also heard about the Avast freeware that it is a very good antivirus and it is a freeware but as it is free most of the people have doubt about its efficiency, including me.

I am not Xp user but I used to be Xp user, now I am a 7 user and I am enjoying being a 7 user. I think you guessed it right and have put it in a right way and manner, and I also guess and think his laptop has problem with registry and that is why he is not able to install programs. his laptop is not with me but I have downloaded few files from your link thanks for the link.

we do not have the CD and that is why we cannot reinstall the Winndows 7 and cope with this problem. we are unable to install the software and that is why we cannot use software like Ccleaner which can help us.

I do not want precise answer I want what cant the problem and want are the ways and things we can try to solve the problem. how can I find program to choose in open with? it is a program file not a video or audio where I can choose a video or audio player.

is ubuntu (linux) is freeware? can I get it free online? I think, there would be other problems related to Linux because there are sites which do not provide there versions for Linux.