diff --git a/checkin_notes b/checkin_notes
index 2565fdf612..5282906786 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -3152,3 +3152,12 @@ David  19 Mar 2009
     client/
         rr_sim.cpp
         work_fetch.cpp,h
+
+Rom    19 Mar 2009
+    - client: initial support for detecting the CPU L2 cache
+        size on Windows.
+        
+    client/
+        client_state.cpp
+        cs_benchmark.cpp
+        hostinfo_win.cpp
diff --git a/client/client_state.cpp b/client/client_state.cpp
index 377870736f..f34e190115 100644
--- a/client/client_state.cpp
+++ b/client/client_state.cpp
@@ -153,10 +153,16 @@ void CLIENT_STATE::show_proxy_info() {
 
 void CLIENT_STATE::show_host_info() {
     char buf[256], buf2[256];
+
+    nbytes_to_string(host_info.m_cache, 0, buf, sizeof(buf));
     msg_printf(NULL, MSG_INFO,
         "Processor: %d %s %s",
         host_info.p_ncpus, host_info.p_vendor, host_info.p_model
     );
+    msg_printf(NULL, MSG_INFO,
+        "Processor: %s cache",
+        buf
+    );
     msg_printf(NULL, MSG_INFO,
         "Processor features: %s", host_info.p_features
     );
diff --git a/client/cs_benchmark.cpp b/client/cs_benchmark.cpp
index 04168bbefd..50b99377ab 100644
--- a/client/cs_benchmark.cpp
+++ b/client/cs_benchmark.cpp
@@ -177,7 +177,6 @@ int cpu_benchmarks(BENCHMARK_DESC* bdp) {
     }
     host_info.p_iops = vax_mips*1e6;
     host_info.p_membw = 1e9;
-    host_info.m_cache = 1e6;    // TODO: measure the cache
 #ifdef _WIN32
 	}
     bdp->host_info = host_info;
@@ -464,7 +463,6 @@ bool CLIENT_STATE::cpu_benchmarks_poll() {
             double p_fpops = 0;
             double p_iops = 0;
             double p_membw = 0;
-            double m_cache = 0;
             for (i=0; i<bm_ncpus; i++) {
                 if (log_flags.benchmark_debug) {
                     msg_printf(0, MSG_INFO,
@@ -482,12 +480,10 @@ bool CLIENT_STATE::cpu_benchmarks_poll() {
                 p_iops += benchmark_descs[i].host_info.p_iops;
 #endif
                 p_membw += benchmark_descs[i].host_info.p_membw;
-                m_cache += benchmark_descs[i].host_info.m_cache;
             }
             p_fpops /= bm_ncpus;
             p_iops /= bm_ncpus;
             p_membw /= bm_ncpus;
-            m_cache /= bm_ncpus;
             if (p_fpops > 0) {
                 host_info.p_fpops = p_fpops;
             } else {
@@ -499,7 +495,6 @@ bool CLIENT_STATE::cpu_benchmarks_poll() {
                 msg_printf(NULL, MSG_INTERNAL_ERROR, "Benchmark: int unexpectedly zero; ignoring");
             }
             host_info.p_membw = p_membw;
-            host_info.m_cache = m_cache;
             print_benchmark_results();
         }
 
@@ -529,7 +524,7 @@ void CLIENT_STATE::print_benchmark_results() {
 #if 0
     msg_printf(
         NULL, MSG_INFO, "Benchmark results: %.0f million bytes/sec memory bandwidth%s",
-    host_info.p_membw/1e6, (host_info.p_membw_err?" [ERROR]":"")
+        host_info.p_membw/1e6, (host_info.p_membw_err?" [ERROR]":"")
     );
 #endif
 }
diff --git a/client/hostinfo_win.cpp b/client/hostinfo_win.cpp
index 48822ac948..ba07814c35 100644
--- a/client/hostinfo_win.cpp
+++ b/client/hostinfo_win.cpp
@@ -16,8 +16,9 @@
 // along with BOINC.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "boinc_win.h"
-#define COMPILE_MULTIMON_STUBS
-#include <multimon.h>
+#ifndef __CYGWIN__
+#include <intrin.h>
+#endif
 
 #include "client_types.h"
 #include "filesys.h"
@@ -152,18 +153,6 @@ typedef struct _MYMEMORYSTATUSEX {
 typedef BOOL (WINAPI *MYGLOBALMEMORYSTATUSEX)(LPMYMEMORYSTATUSEX lpBuffer);
 
 
-// Traverse the video adapters and flag them as potiential accelerators.
-struct INTERNALMONITORINFO
-{
-    DWORD  cb;
-    TCHAR  DeviceName[32];
-    TCHAR  DeviceString[128];
-    DWORD  StateFlags;
-    TCHAR  DeviceID[128];
-    TCHAR  DeviceKey[128];
-};
-
-
 // Returns the number of seconds difference from UTC
 //
 int get_timezone(int& timezone) {
@@ -651,9 +640,10 @@ BOOL is_processor_feature_supported(DWORD feature) {
 //
 int get_processor_info(
     char* p_vendor, int p_vendor_size, char* p_model, int p_model_size,
-    char* p_features, int p_features_size
+    char* p_features, int p_features_size, double& p_cache
 )
 {
+    int CPUInfo[4] = {-1};
 	char vendorName[256], processorName[256], identifierName[256], capabilities[256], temp_model[256];
 	HKEY hKey = NULL;
 	LONG retval = 0;
@@ -695,20 +685,28 @@ int get_processor_info(
     }
     strip_whitespace(capabilities);
 
-    
+
+#ifndef __CYGWIN__
+    // determine CPU cache size
+    // see: http://msdn.microsoft.com/en-us/library/hskdteyh(VS.80).aspx
+    __cpuid(CPUInfo, 0x80000006);
+    p_cache = (double)((CPUInfo[2] >> 16) & 0xffff) * 1024;
+#endif
+
+
 	retval = RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Hardware\\Description\\System\\CentralProcessor\\0", 0, KEY_QUERY_VALUE, &hKey);
 	if(retval == ERROR_SUCCESS) {
         // Win9x and WinNT store different information in these field.
         // NT Examples:
-        // ProcessorNameString: Intel(R) Xeon(TM) CPU 3.06GHz
-        // Identifier: x86 Family 15 Model 2 Stepping 7
-        // VendorIdentifier: GenuineIntel
-        // ~MHz: 3056
+        //     ProcessorNameString: Intel(R) Xeon(TM) CPU 3.06GHz
+        //     Identifier: x86 Family 15 Model 2 Stepping 7
+        //     VendorIdentifier: GenuineIntel
+        //     ~MHz: 3056
         // 9X Examples:
-        // ProcessorNameString: <Not Defined>
-        // Identifier: Pentium(r) Processor
-        // ~MHz: <Not Defined>
-        // VendorIdentifier: GenuineIntel
+        //     ProcessorNameString: <Not Defined>
+        //     Identifier: Pentium(r) Processor
+        //     ~MHz: <Not Defined>
+        //     VendorIdentifier: GenuineIntel
 
         // Look in various places for processor information, add'l
 		// entries suggested by mark mcclure
@@ -786,7 +784,8 @@ int HOST_INFO::get_host_info() {
     get_processor_info(
         p_vendor, sizeof(p_vendor),
         p_model, sizeof(p_model),
-        p_features, sizeof(p_features)
+        p_features, sizeof(p_features),
+        m_cache
     );
     get_processor_count(p_ncpus);
     get_local_network_info();