first of all welcome to mt secondly I recommend you to remove system mechanic pro as soon as you can from your pc. it is a real system wrecker and can leave it useless and unussable, you are better of with ccleaner , glary utilities or wisecare 365 free , if you want paid oftware get auslogics boostspeed or iobit advanced systemcare pro. you can add zenmate and https everywhere as extensions to firefox. do you have any backup software? or do yiou trust on shadowdefender solely? why do you not upgrade Bitdefender to the 2015 version?
Thanks for all the advice. I'll take them into account. I don't upgrade Bitdefender to the 2015 version and I don't use backup software because I plan to install Windows 8.1 on a new SSD, then I will install the latest versions of programs and take care of the backup copy. Only somehow I can not go about it