The Windows error "I/O Device Error" means there is an error in the computer's ability to read data.
I/O refers to Input and Output.
As the error is only reported during backups, it is at this stage reasonable to suspect that something, either a program, your anti-virus, or a registry error is causing this.
If the HDD in the computer had errors then Windows7 would more than likely have scheduled it for a disk check. Have you seen this when you have booted.
The recent chkdsk report however is a possible cause for concern, as the error can be caused by a failing hard drive. I would NOT associate that with the original and continued error from the backup procedure.
However, if albeit the hammer has not been taken to the computer, but your
anger issues and frankly im suprised i havent smashed the computer yet.
issues have resulted in violent movement of the computer, particularly whilst it was running, then THAT could very easily be the reason for the report you say we have now. If you are certain that the chkdsk DID report bad sectors then I can assure you that they have NOT been fixed.
BAD SECTORS cannot be repaired - chkdsk simply attempts to recover the data from the bad sector and rewrites it to a good sector.
The original error I suspect is caused by
1. That Macrium Software. OR
2. Anti-virus OR
3. The back-up drive - corruption in files there OR
4. Possible registry errors - frequently caused by the use of a registry cleaner - which is ALWAYS INADVISABLE
Finally, whilst I am prepared to help, this is the last post I will make until you reply that you are wanting to work with me, are prepared for what I think will be a rather long process and that you have a REAL desire to solve the issue.
You can start by replying to my question regarding free space and if that MACRIUM SOFTWARE is the free edition OR a paid for edition for which you have the activation key etc., as it has NEVER been used for a backup, there cannot be one that relies on it for restore of that backup, therefore UNINSTALL IT. This will eliminate one possible cause.
When you do reply we will then obtain the results of the chkdsk in detail, we will run system file checker and take it from there.