I bought a lenovo z50, intel i7 processor laptop about 90days ago. But it is working slow?

Defrag, and also check your task manager/processes to find out what is taking up the most memory and/or the most CPU.

Sorry to hear that you are having slowdowns and issues with your new computer!

You can try certain things such as looking at processes, tasks running at start up, and checking to see if you have any Malware or viruses on your computer. Sometimes when people purchase a new computer, they do not know that the trial software of Antivirus will need to be removed before the

Without any further information on the actual specifications of the computer it is difficult to know if a ram expansion would be helpful (or even possible); however, you might look to see if your computer is running slow because it does not have enough ram to run the programs and processes that you want to be running all at once.

If your computer is less than 90 days old, in most cases it would be covered by a manufacturer warranty directly from the manufacturer. Lenovo offers a 1 year limited manufacturer warranty to cover hardware related issues that sometimes occur. We would recommend that you have your computer looked at by a qualified professional to determine if the issues you are experiencing are software related or possibly because of a hardware problem.