Im not sure if this method will work on Home (been like 5 years) but try this:
Open my computer>tools>folder options>view>UnCheck "use simple file sharing"> OK out. Close my computer and then reopen it. go to the files/folders you want to block and right click>properties. Go to security tab>remove every user except yourself and SYSTEM. This should block other people from accessing the folders/files. Note: This will not work if other people use your account.