Lavasoft released Ad-Aware 8.1 which offers faster scans, improved design and different modes for scanning. Ad-Aware Free Anti-Malware features real-time protection, a rootkit removal system, automatic updates, and much more to ensure that you have the power to protect yourself online. It is still the best tool for running a basic adware scan. It offers below features
Ad-Aware is available for Windows ( Windows Vista 32 and 64-bit, Windows XP 32-bit, Windows 2000 Pro ) only, comes in free and paid versions. Download from here.