I keep getting this error

Using 'dbghelp.dll' version '4.0.5'
*Dump thread - spid = 112, PSS = 0x49b051f0, EC = 0x49b05520
*Stack Dump being sent to D:\Program Files\Microsoft SQL Server\MSSQL\log\SQLDump0576.txt

Stack Signature for the dump is 0x16F06946

SQL Server Assertion: File: <recbase.cpp>, line=1378
Failed Assertion = 'm_offBeginVar < m_SizeRec'.

Error: 3624, Severity: 20, State: 1.

DBCC gives me consistency errors with index id 0.

Restarting the sql server services and the error disappears but then reappears after 2-3 days.

All help is appreciated....