VMware has released a patch for VMware ESX 3.5 and VMware ESX 3.5i.
1.Read the following Knowledge Base articles first:
Fix of virtual machine power on failure issue, refer to KB 1006716
For VI 3.5, refer to KB 1006721 for deployment consideration and instruction
For VI3.5i, refer to KB 1006670 for deployment consideration and instruction
2. Download and apply the patch according to the product(s) you have:
VMware ESXi 3.5 Update 2 Patch | VMware ESX 3.5 Update 2 Patch