Stand alone flash projector simply works. Screw Firefox and Edge/MSIE work arounds.
If you regularly have to reset to a backup state, you probably have an issue with a corrupt sector on you HDD or a faulty RAM stick. I'm guessing the restore points are frequently the result of the blue screen of death. I would recommend looking up how to run diagnostics on said issues if this is the case because it will get worse.
True that and +1. Faulty computer hardware will be simply your death. The image pack version of TiTS needs a half gig of space on your hdd, let alone active memory to operate.
Use Microsoft's ram test, or a copy of MemTestx86 to blast your ram and see if there is a fault there. If your primary computer is that unstable, burning it to disc or a bootable flash drive from another machine, friend's loaner or a library system will get you what you need.
If it passes, consider an in place Windows install/upgrade to replenish system and o/s files without losing your logins/apps, etc.
Otherwise, I use stand alone Flash Projector on Windows-x professional, latest build, 100% Adrenaline - Zero fucking defects. ^.^