Yes you can put in an SSD provided that it uses the SATA interface/connector. The Hybrid drive that you provided a link is compatable to your computer. Follow this link to change your Hard Drive: iMac Intel 24" EMC 2134 and 2211 Hard Drive Replacement As for the RAM, your computer is compatable with PC2-5300 RAM sticks, to change it follow this link: iMac Intel 24" EMC 2134 and 2211 RAM Replacement Just be sure to check what the max supported RAM for your computer is by: Click the apple logo in the top left corner. Click "about this mac". Then click the "memory" tab in the window that opens. On that page it should tell you what type of RAM your system supports and it should provide a link for RAM upgrades. Follow that link and identify your system to check what is the max supported RAM by your system. This will help because if you put in RAM that is a larger capacity that what your system supports then your system will only recognise the amount that it supports and the rest will not be used. Also make sure yo...
One of the sensors might be failing or broken. You'll have to open each sensor and check its connections to see if they are good. Then disconnect all of the sensors and test them one at a time and replace the one that isn't working. EDIT: These images show what most of the door sensors look like on newer cars, they can either be on the car body where the door will press against it when closed or on the door where it will be pressed against the car body when the door is closed.
Are the screws completely stripped? If they arent then you could try to wedge a flat head screw driver in the screw and use that to turn the screws. Be extremely careful as this could strip the screws further and also could injure you if the screwdriver slips.
Some of the windows files might be corrupted. Use the Windows boot disk that you got with the computer and start up windows repair, let it do its work and it should fix the problem. If that doesnt work then try doing a clean install of Windows to see if that works. If it doesnt work then there might be a problem with either your hard drive, the hard drive cable, the RAM or even the motherboard. Have you changed any of the hardware recently? If you have then try changing back to the old setup.
Yes, just import those songs into the itunes library and tell itunes to sync these songs. iTunes can automatically scan for music files. To scan: 1.Open iTunes. 2.Select the Music icon in the upper-left corner. 3.Click My Music from the upper-middle. 4.Click "Scan for Media." or you can manually add the music from a folder on your computer: 1.Open iTunes. 2.Choose File > Add Folder to Library. If you do not see the File, Edit or View options, press Ctrl and B together on your keyboard. 3.Locate the folder on your computer that contains the music you wish to import into iTunes. 4.Once you select your folder you should now see your newly imported files in your iTunes library.
You can take it apart but it will be very difficult and may not fix the problem. This link will take you to the page where you can take apart every part of you Macbook: MacBook Pro 15" Retina Display Early 2013 Repair NOTE: I dont recomend that you take it apart because it is a difficult process and requires an EXTREME amount of technical skills and care. Plus you will need some precision tools which most households dont have.