steam debug assertion failed

[DeerLight]

when starting it steam it attempts to verify installation pulls this:



Microsoft Visual C++ Debug Library


Program C:\Program Files (x86)\steam\Steam.exe

DAMAGE: after Normal block (#189) at 0x067E3100.

(press retry to debug the application)


pressing ignore gives this:

Microsoft Visual C++ Debug Library


Debug Assertion Failed!

Program C:\Program Files (x86)\steam\Steam.exe
File: dbgheap.c
Line:1017

Expression:_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)

three options to me are: abort, retry and ignore

abort on both screens gives this result

Program C:\Program Files (x86)\steam\Steam.exe

DAMAGE: after Normal block (#333) at 0x06904c60.

(press retry to debug the application)

any other option closes the program