First off, make sure all your mods are in .zip format. If they're not and you don't know who to fix that, do like this:
1. Put your .jar mods in a sepperate folder on your dekstop.
2. Right click on one and click "pack up here"
3. When you got all the files from the mod, select all of them, right click and choose "add to archive"
4. Change it so it is a .zip format and rename it to that mod.
5. Now you have a .zip mod instead of a .jar mod. Put it in the mods folder and it should work!
If it still doesn't work, get your modpack.zip file and drag it into C:\Users\User\AppData\Roaming\.technic\modpacks\Your Modpack\cache
