Pc board stand offs

Hi, so one day for some crazy reason I took my laptop apart to add thermal paste but instead added liquid nails. Not knowing or doing any research on how bad it is to do so, I added it anyway on my cpu. But to top it off I added blue or red loctite to my screws that hold the heatsync, about 9 screws. After using the laptop a few times my laptop started making crackling noises. My thoughts were maybe it's the liquid nails there moving about the inside of my laptop freely! So to be safe I opened my laptop to remove the liquids nails and never use again. Now what about the screws I started thinking with them being locked with loctite? Well now I have 3 screws with broken heads, and 2 or 3 others that won't come out....

Can you make a video on how to use the precision screw set? My laptop has been sitting there for about 3 years now. I do charge it every 3 to 6 months to keep the battery in good health. I just don't have the expertise on this kind of soldering issue and the worse part is that it's a new laptop only used it a handful of times.