Right now i have a folder with another folder inside of it. The two folder names are called \"pc details\" and \"pchardwaredetails\"
When on a page in \"pchardwarede
Usually the Referrer of the page (a HTTP header), tells you what page you've come from so to go back you should just be able to do:
Response.Redirect(Request.UrlReferrer.ToString());
That's assuming you came from PC Details. However if you land on PC Hardware Details from some other page then that won't work, you would have to hard code the back feature.
You can simplify ASP.NET paths and use ~, for example:
Response.Redirect("~/some/path/pc_details.aspx");