This is often caused by malware damage, and malware can hide in the System Restore backup files where it can remain undetected by anti-virus and anti-spyware scans.

I would disable System Restore, which deletes all restore point backup files, the re-enable it again. Right click your My Computer icon, select Properties, then in the System Restore tab, disable System Restore, click Apply. Then re-enable.

You may want to update and scan with your anti-malware utilities in-between disabling and enabling, in Safe Mode, where most malware cannot load up.

Also, I would consider scanning with MalwareBytes AntiMalware, (MBAM), from http://www.malwarebytes.org/.

I note you use a downloader, so you put your system at greater risk from infected files, even if the P2P based application is spyware and adware free itself.

Also, I note you use a system optimizer. I have never used IObits Advanced System Care myself, but I tend to stay away from such utilities because one wrong delete and they can do more damage than they help.

I don't know about the printer problem, but perhaps you could disconnect the printer, uninstall the software, reboot, re-install the software before connecting the printer again. See if that resolves it.

Mark