Broken security permissions for ntuser.dat

Recently my laptop had a power issue and I sent it for repairing. Given I had some files that I needed to keep close by, we attached the SSD to another system running windows 7, opened my user Folder and took some files from my Downloads folder. When we tried to open the user folder it said that it needs to get permission to open that folder and we pressed continue and then we were able to enter the folder and copy the files. Now that my laptop is repaired, I am unable to enter my own account and I am redirected to a TEMP user folder. All files and folders seem to be intact inside my user folder. The event viewer shows that when trying to read my profile data from ntuser.dat it gets the ACCESS DENIED error. I have already tried sfc /scannow and other tutorials like restarting 4 times or altering the registry to login to my account, but in the end, it seems that there is a serious issue with my user folder's security permissions. I have viewed the security tab for the mentioned folder and all permissions are given to my user, SYSTEM and the administrator. Also, if I try to open a txt file it shows an error saying the path specified is wrong and it did not find the file! even copying the file elsewhere and trying to open it will not work. How can I fix this permission issue and get to load my account data and enter my own Desktop again?