Question about Outlook Express

I can't update Windows Security Essentials get error code 0x800A0046,and my Windows Update isn't working either and get code 0x80070005. I have tried for the last two weeks to fix these error using various Microsoft support programs and various other programs I found on the net. I  ran sfc.exe but nothing has worked. All was working until I started my computer up the next day and then these problems occurred. I know what the error code means but can't find a SIMPLE or even a fix for these error codes. I ran Troubleshooting on windows update and it noted all was OK but when I went into details I notice something weird:   it said "Troubleshooting problem preventing windows update" I really don't know what this means or if it is even relevant. When I tried to update Windows Security Essentials I also get the same error code I get for windows update 0x80070005. I have tried System Restore but the problems remain. I don't know what has caused the updating problems blmeut they are starting to affect some other programs that require updating. I really need a simple explanation of why this happened and a SIMPLE set of instructions if someone knows how to repair these problems because I am not that computer literate. I don't have a reinstall disk either.

I am using Acer notebook with windows professional 64 bit with internet explorer 11. Thanks and I hope someone knows how to repair these errors.